<template>
  <el-container class="home-container">
<!--头部区域-->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
<!--页面主体区域-->
    <el-container>
<!--侧边栏-->
      <el-aside :width="isCollapse ? '64px' : '200px'" unique-opened>
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" :collapse="isCollapse" :collapse-transition="false" :router="true">
          <!--一级菜单-->
          <el-submenu :index="item.id.toString()" v-for="item in menuList" :key="item.id">
            <!--一级菜单的模板区-->
            <template v-slot:title>
              <!--图标-->
              <i :class="iconsObj[item.id]"></i>
              <!--文本-->
              <span>{{ item.authName }}</span>
            </template>
            <!--二级菜单-->
            <el-menu-item :index="'/'+subItem.path.toString()" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path.toString())" :default-active="activePath">
              <!--二级菜单的模板区-->
              <!--图标-->
              <i class="el-icon-menu"></i>
              <!--文本-->
              <span>{{ subItem.authName }}</span>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
<!--右侧内容主体-->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-yonghu',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 侧边菜单是否折叠
      isCollapse: false,
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
  },
  methods: {
    // 退出登录功能
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.msg)
      this.menuList = res.data
      console.log(this.menuList)
    },
    // 切换侧边菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = window.sessionStorage.getItem('activePath')
    }
  }
}
</script>

<style lang="less" scoped>
.home-container{
  height:100%;
}

.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  // 这种写法只直接控制了第一个div
  > div{
    display: flex;
    align-items: center;
    span{
      margin-left: 15px;
    }
    img{
      height:60px;
    }
  }
}

.el-aside{
  background-color: #333744;
  .toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  };
  .el-menu{
    border-right:none;
  }
}

.el-main{
  background-color: #eaedf1;
}

.iconfont{
  margin-right:10px;
}
</style>
